Added timeout option to SQLite3 configurations to deal more gracefully with SQLite3::BusyException, now the connection can instead retry for x seconds to see if the db clears up before throwing that exception (closes #6126) [wreese@gmail.com] Added default timeout setting of 5 seconds to SQLite3 database.yml configurations [DHH]

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Added update_attributes! which uses save! to raise an exception if a validation error prevents saving (closes #6192) [jonathan]

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Association collections have an _ids reader method to match the existing writer for collection_select convenience (e.g. employee.task_ids). The writer method skips blank ids so you can safely do @employee.task_ids = params[:tasks] without checking every time for an empty list or blank values.  References #1887, Closes #5780.

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Deprecation: count class method should be called with an options hash rather than two args for conditions and joins. Closes #6287.

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Deprecation tests. Remove warnings for dynamic finders and for the foo_count ethod if it's also an attribute.

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We cant make MySQL 5 happy if it means making SQLite and PostgreSQL cry. So currently MySQL 5 is not fully supported for Rails when youre using eager loading (closes #6133, #6135). I have contacted MySQL to make them fix http://bugs.mysql.com/bug.php?id=13551 [DHH]

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Added parentheses around FROM clauses generated by Base and associations since MySQL 5 claim that to be the standard (and will screw up joins if its not there), see http://bugs.mysql.com/bug.php?id=13551 [DHH]

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Backed out of new_record? to new? transformation as it would screw up existing models that did boolean calls on "new" attributes [DHH]

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Deprecated ActiveRecord::Base.new_record? in favor of ActiveRecord::Base.new? (old version still works until Rails 2.0) [DHH]

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Fixed the Ruby/MySQL adapter we ship with Active Record to work with the new authentication handshake that was introduced in MySQL 4.1, along with the other protocol changes made at that time (closes #5723) [jimw@mysql.com]

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Deprecation: use :dependent => :delete_all rather than :exclusively_dependent => true. Closes #6024.

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Document validates_presences_of behavior with booleans: you probably want validates_inclusion_of :attr, :in => [true, false]. Closes #2253.

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validates_confirmation_of only kicks in when the attribute, rather than its confirmation, is present. Closes #785.

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has_one supports the :dependent => :delete option which skips the typical callback chain and deletes the associated object directly from the database. Closes #5927.

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Nested subclasses are not prefixed with the parent class' table_name since they should always use the base class' table_name. Closes #5911.

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SQLServer: work around bug where some unambiguous date formats are not correctly identified if the session language is set to german. Closes #5894.

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